join_channel
Connect to a specific Figma channel for communication, enabling Cursor AI to read and modify designs programmatically through natural language commands.
Instructions
Join a specific channel to communicate with Figma
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| channel | No | The name of the channel to join |
Implementation Reference
- src/talk_to_figma_mcp/server.ts:2961-3006 (registration)MCP tool registration for 'join_channel' including inline handler and schema definition.
server.tool( "join_channel", "Join a specific channel to communicate with Figma", { channel: z.string().describe("The name of the channel to join").default(""), }, async ({ channel }) => { try { if (!channel) { // If no channel provided, ask the user for input return { content: [ { type: "text", text: "Please provide a channel name to join:", }, ], followUp: { tool: "join_channel", description: "Join the specified channel", }, }; } await joinChannel(channel); return { content: [ { type: "text", text: `Successfully joined channel: ${channel}`, }, ], }; } catch (error) { return { content: [ { type: "text", text: `Error joining channel: ${error instanceof Error ? error.message : String(error) }`, }, ], }; } } ); - The main handler function for the 'join_channel' tool. Validates input, calls joinChannel helper, and returns success/error response.
async ({ channel }) => { try { if (!channel) { // If no channel provided, ask the user for input return { content: [ { type: "text", text: "Please provide a channel name to join:", }, ], followUp: { tool: "join_channel", description: "Join the specified channel", }, }; } await joinChannel(channel); return { content: [ { type: "text", text: `Successfully joined channel: ${channel}`, }, ], }; } catch (error) { return { content: [ { type: "text", text: `Error joining channel: ${error instanceof Error ? error.message : String(error) }`, }, ], }; } } - Zod input schema for the tool, defining the 'channel' parameter.
{ channel: z.string().describe("The name of the channel to join").default(""), }, - Helper function that sends the WebSocket 'join' message to the socket server (src/socket.ts) to join the specified channel.
async function joinChannel(channelName: string): Promise<void> { if (!ws || ws.readyState !== WebSocket.OPEN) { throw new Error("Not connected to Figma"); } try { await sendCommandToFigma("join", { channel: channelName }); currentChannel = channelName; logger.info(`Joined channel: ${channelName}`); } catch (error) { logger.error(`Failed to join channel: ${error instanceof Error ? error.message : String(error)}`); throw error; } }